用碱矿渣胶凝材料粘贴FRP布加固混凝土结构的剪切性能

为解决环氧类有机胶耐火性差的问题,选择工业副产品粒化高炉矿渣为原料,水玻璃为碱性激活剂,制备了一种用于FRP加固混凝土结构的耐高温无机胶——碱矿渣胶凝材料.通过考察水玻璃模数与用量,以及水用量对胶块抗压强度的影响,优选出碱矿渣胶凝材料的最佳配比为:水玻璃模数Ms=1.0,水玻璃用量为矿渣粉质量的12％,水用量为矿渣粉质量的42％.通过面内剪切试验,研究了FRP布和胶黏剂类型对FRP布与混凝土基材的界面剪切性能的影响,建议了2种CFRP布的有效黏结长度为160和220 mm.试验结果表明:碱矿渣胶凝材料用于粘贴CFRP布加固混凝土结构效果良好,其面内剪切强度与有机胶相当,界面破坏呈现胶层下混凝土大面积剥离的理想破坏模式.     

碱-偏高岭土胶凝材料的凝结硬化性能研究

对碱 偏高岭土胶凝材料的凝结硬化性能进行了研究.研究方法是将碱激发剂∶偏高岭土∶砂=0.7∶1∶1(质量比)混合并成型为3cm×3cm×3cm的试块,在规定的条件下养护到规定的时间,根据试块的抗压强度来评价凝结硬化性能.试验结果表明:碱 偏高岭土胶凝材料的胶砂强度随碱的浓度增加而加快;随养护温度升高和养护时间延长而加快;与水玻璃的模数有关.当水玻璃模数为0.75～1时,胶砂强度发展速率迅速;当水玻璃模数≥2时,砂浆在80℃养护24h不能脱模;当水玻璃模数为0.5时,砂浆拌合时发生闪凝.由此可以推断:当水玻璃模数为0.75～1时,水玻璃中SiO2初始状态有利于反应产物的形成以及(或者)偏高岭土在该水玻璃的碱浓度中的溶解度可能与反应物的形成速度相匹配.     

从粉煤灰中提取氧化铝熟料溶出过程工艺研究

对粉煤灰和石灰石烧成的熟料在碳酸钠溶液中的溶出过程进行研究,探讨碳酸钠用量、溶出温度、溶出时间及液固比等工艺条件对熟料溶出中Al2O3和SiO2溶出效果的影响。研究结果表明:在碳酸钠用量约为理论量的1.0倍,溶出温度为50～60℃,保温时间为40～60 min,液固比为3～4的条件下,熟料中Al2O3的溶出率大于82%,溶出液中Al2O3质量浓度约为36 g/L,溶液的硅量指数铝、硅质量比大于46;溶出产生的钙硅渣成分及其质量分数为:Al2O3 2.60%,SiO2 24.31%,CaO 58.40%,Fe2O3 1.79%,TiO2。0.49%,Na2O 0.53%;熟料的主要物相为γ-2CaO.SiO2和CaCO3。     

聚合硫酸铁铝硅混凝剂的制备及其性能

研究以硫铁矿烧渣、铝酸钙粉、水玻璃、硫酸为原料，通过酸溶、中和、聚合过程，制备新型复合混凝剂——聚合硫酸铁铝硅(PFASS)的方法．考察了制备工艺对产品稳定性的影响，并对其混凝性能进行了研究．试验结果表明，当Fe^3 Al^3 的摩尔浓度为2．4mol／L、Fe^3 Al^3 ／SiO2摩尔比为10时，产品会有较好的贮存稳定性(即产品保持良好的流动性，无胶凝现象)．聚合硫酸铁铝硅与聚合硫酸铁(PFS)的混凝对比结果表明，PFASS具有更优的混凝除浊性能，具有较宽的pH适用范围．     

响应曲面法优化土聚水泥的制备研究

该文以煤系高岭土和碱激发剂水玻璃为原料,煅烧温度、水玻璃模数和掺量为3个试验因素,以凝结时间、强度和收缩值为响应值,利用响应曲面法进行设计3因素3水平试验,通过对回归方程分析探讨制备性能优异的土聚水泥的最优条件参数。研究结果表明,土聚水泥的最佳制备参数为:偏高岭土煅烧温度约为850℃,水玻璃模数为1.1,水玻璃掺量介于19%～20%之间。     

珍珠岩高温碱溶制取水玻璃

将珍珠岩与NaOH混合进行高温碱溶，结果表明：珍珠岩与NaOH的质量比为1.00:0.75,在550℃灼烧1h，可使珍珠岩的化学有效成价SiO2溶出率达83％以上，溶出液可做工业用水玻璃，经分析质量达到国家标准。     

铝灰渣高效利用的试验研究

以废铝灰渣为原料利用碱酸碱法制备聚合氯化铝,探讨加热温度、混合物配比、保温时间对固相热分解阶段的影响,以铝灰溶出率为指标探索酸溶及碱溶的最佳工艺.对处理后的残渣进行XRD图谱分析,以确定残渣的主要成分.且通过Al-Ferron逐时络合比色法对所制备的聚合氯化铝溶液中铝水解形态进行分析.研究结果表明:经碱酸碱处理后铝灰的溶出率高达95.94%,由此可合成高浓度(0.53 mol/L)高Alb(85%)含量的PAC溶液.且铝灰经此工艺处理后剩余残渣量少,主要成分为α-Al2O3.     

综合加权评分法优化麦糟不溶性膳食纤维分离工艺

优化化学法制备麦糟不溶性膳食纤维的碱溶工艺条件.通过单因素和正交试验,考察NaOH浓度、碱溶温度和碱溶时间对不溶性膳食纤维得率和不溶性膳食纤维中杂质含量的影响,分析因素的主次顺序和显著性,优化工艺条件.结果表明,在NaOH浓度0.375 moL/L,碱溶温度60℃,碱溶时间70 min条件下,制备得到麦糟不溶性膳食纤维的质量较高,验证试验不溶性膳食纤维得率为35.36%,不溶性膳食纤维中蛋白质质量分数为4.96%,综合评分为75.48,与正交试验结果75.57相差0.12%,结果可行.     

两段烧结工艺中的Ⅰ段赤泥烧结

研究了铝土矿两段烧结工艺的Ⅱ段烧结及溶出的最佳操作条件，确定Ⅰ段赤泥在钙比为２３５，烧结温度为１１２０～１２００℃时，氧化钠溶出率达９２％左右，氧化铝溶出率达８１％左右；当溶出液氧化铝质量浓度为４０～８０ｇ／Ｌ时，Ⅱ段熟料溶出的二次反应很弱，溶出条件宽松．因此，两段烧结新工艺处理铝硅比为６的矿石，氧化钠总溶出率达９８６％，氧化铝总溶出率达９６８％，碱的化学损失是每吨氧化铝损失碳酸钠１８ｋｇ．     

马钱子生物碱微囊的制备及评价

为降低马钱子生物碱的释放速率,采用乳化-溶剂扩散法制备马钱子生物碱微囊,以载药量、包封率、外观形态等为考核指标,通过正交试验对制备工艺条件进行优化并考察其体外溶出性能。结果表明:在优化的工艺条件(囊芯和囊材质量比为1∶2,囊材质量浓度0.135g/mL,乳化剂体积分数2%,有机相和水相体积比为1∶5)下3次平行制得微囊的包封率和载药量的平均值分别为53.99%和18.25%;微囊外观光滑圆整,流动性好且粒径分布较窄;微囊中的马钱子碱与士的宁在人工胃液中具有良好的体外缓释效果。     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

Exciton Seebeck in Molecular Systems

Various applications relevant to the exciton dynamics,such as the organic solar cell,the large-area organic light-emitting diodes and the thermoelectricity,are operating under temperature gradient.The potential abnormal behavior of the exicton dynamics driven by the temperature difference may affect the efficiency and performance of the corresponding devices.In the above situations,the exciton dynamics under temperature difference is mixed with     

Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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An on-line scaling method for improving scalability of a database cluster

The explosive growth of the Internet and database applications has driven database to be more scalable and available, and able to support on-line scaling without interrupting service. To support more client's queries without downtime and degrading the response time, more nodes have to be scaled up while the database is running. This paper presents the overview of scalable and available database that satisfies the above characteristics. And we propose a novel on-line scaling method. Our method improves the existing on-line scaling method for fast response time and higher throughputs. Our proposed method reduces unnecessary network use, i.e. , we decrease the number of data copy by reusing the backup data. Also, our on-line scaling operation can be processed parallel by selecting adequate nodes as new node. Our performance study shows that our method results in significant reduction in data copy time.     

An improved R-tree based on childnode''s probability

R-Tree is a good structure for spatial searching. But in this indexing structure,either the sequence of nodes in the same level or sequence of traveling these nodes when queries are made is random. Since the possibility that the object appears in different MBR which have the same parents node is different, if we make the subnode who has the most possibility be traveled first, the time cost will be decreased in most of the cases. In some case, the possibility of a point belong to a rectangle will shows direct proportion with the size of the rectangle. But this conclusion is based on an assumption that the objects are symmetrically distributing in the area and this assumption is not always coming into existence. Now we found a more direct parameter to scale the possibility and made a little change on the structure of R-tree, to increase the possibility of founding the satisfying answer in the front sub trees. We names this structure probability based arranged R-tree (PBAR-tree).     

Integrating GIS Web services based on mediating architecture

The geographic information service is enabled by the advancements in general Web service technology and the focused efforts of the OGC in defining XML-based Web GIS service. Based on these models, this paper addresses the issue of services chaining,the process of combining or pipelining results from several interoperable GIS Web Services to create a customized solution. This paper presents a mediated chaining architecture in which a specific service takes responsibility for performing the process that describes a service chain. We designed the Spatial Information Process Language (SIPL) for dynamic modeling and describing the service chain, also a prototype of the Spatial Information Process Execution Engine (SIPEE) is implemented for executing processes written in SIPL. Discussion of measures to improve the functionality and performance of such system will be included.     

Tracking data management using topology of moving object database system for moving object constrained trajectory in LBS application

Advances in wireless technologies and positioning technologies and spread of wireless devices, an interest in LBS (Location Based Service) is arising. To provide location based service, tracking data should have been stored in moving object database management system (called MODBMS) with proper policies and managed efficiently. So the methods which acquire the location information at regular time intervals then, store and manage have been studied. In this paper, we suggest tracking data management techniques using topology that is corresponding to the moving path of moving object. In our techniques, we update the MODBMS when moving object arrived at a street intersection or a curved road which is represented as the node in topology and predict the location at past and future with attribute of topology and linear function. In this technique, location data that are corresponding to the node in topology are stored, thus reduce the number of update and amount of data. Also in case predicting the location,because topology are used as well as existing location information, accuracy for prediction is increased than applying linear function or spline function.